scholarly journals Facile fabrication of hierarchical porous carbon for a high-performance electrochemical capacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46329-46335 ◽  
Author(s):  
Guixiang Du ◽  
Qiuxiao Bian ◽  
Jingbo Zhang ◽  
Xinhui Yang
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
Electrochemical Capacitor ◽  
High Specific Capacitance ◽  
Cycling Performance ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Facile Fabrication ◽  
Rapid Pyrolysis

A facile and rapid pyrolysis method is developed for the synthesis of 3D hierarchical porous carbon, which exhibits a high specific capacitance, good rate capability and good cycling performance.

One-step Synthesis of O-self-doped Honeycomb-like Hierachically Porous Carbons for Supercapacitors

2021 ◽  
pp. 1-19
Author(s):  
Shiying Lin ◽  
Lanlan Mo ◽  
Feijun Wang
Keyword(s):  
Electrode Material ◽  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Electrode System ◽  
Porous Carbon Material ◽  
Hierarchical Porous ◽  
One Step ◽  
Porous Carbon Electrode

Abstract A facile and environmentally friendly approach to produce self-doped hierachically porous carbon as electrode material for high-performance supercapacitor was demonstrated. 3D honeycomb-like hierarchically porous carbon was successfully obtained by one-step carbonization and activation of sodium carboxymethyl cellulose (CMC) via K2CO3. With the optimized temperature of carbonization and activation, the porous carbon material achieved well-shaped hierarchically pores (micro-, meso and macropores) like a honeycomb, ultrahigh specific surface area (1666 m2·g-1), as well as highly O-self-doping (3.6 at.%), endowing an excellent electrochemical properties for the electrode in three-electrode system. The porous carbon electrode material delivered a high specific capacitance of 300.8 F·g-1 at 1 A·g-1, an eminent rate capability of 228.4 F·g-1 at the current density up to 20 A·g-1 and outstanding cycle stability of 94.3% retention after 10000 cycles. Therefore, the CMC derived hierarchical porous carbon activated by K2CO3 would have promising foreground in application of supercapacitors.

scholarly journals Nest-Like MnO2 Nanowire/Hierarchical Porous Carbon Composite for High-Performance Supercapacitor from Oily Sludge

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2715
Author(s):  
Xiaoyu Li ◽  
Dong Han ◽  
Zhiqiang Gong ◽  
Zhenbo Wang
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Hot Spot ◽  
Rate Capability ◽  
Precipitation Method ◽  
Oily Sludge ◽  
Hierarchical Porous Carbon ◽  
Capacitance Performance ◽  
Hierarchical Porous

In the aim to go beyond the performance tradeoffs of classic electric double-layer capacitance and pseudo-capacitance, composites made out of carbon and pseudo-capacitive materials have been a hot-spot strategy. In this paper, a nest-like MnO2 nanowire/hierarchical porous carbon (HPC) composite (MPC) was successfully fabricated by a controllable in situ chemical co-precipitation method from oily sludge waste. Due to the advantages of high surface area and fast charge transfer for HPC as well as the large pseudo-capacitance for MnO2 nanowires, the as-prepared MPC has good capacitance performance with a specific capacitance of 437.9 F g−1 at 0.5 A g−1, favorable rate capability of 79.2% retention at 20 A g−1, and long-term cycle stability of 78.5% retention after 5000 cycles at 5 A g−1. Meanwhile, an asymmetric supercapacitor (ASC) was assembled using MPC as the cathode while HPC was the anode, which exhibits a superior energy density of 58.67 W h kg−1 at the corresponding power density of 498.8 W kg−1. These extraordinary electrochemical properties highlight the prospect of our waste-derived composites electrode material to replace conventional electrode materials for a high-performance supercapacitor.

Facile fabrication of N-doped hierarchical porous carbon@CNT coaxial nanocables with high performance for energy storage and conversion

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96580-96586 ◽  
Author(s):  
Yuanyuan Li ◽  
Wei Xia ◽  
Ruqiang Zou ◽  
Jianan Zhang ◽  
Zhimin Chen ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Performance Optimization ◽  
High Performance ◽  
Reduction Reaction ◽  
Energy Storage And Conversion ◽  
Hierarchical Porous Carbon ◽  
Carbon Nanostructure ◽  
Hierarchical Porous ◽  
Facile Fabrication ◽  
Coaxial Nanocables

N-Doped hierarchical porous carbon@CNT coaxial nanocables were facilely synthesized and demonstrated to be an ideal carbon nanostructure for electrochemical performance optimization for supercapacitors and in the oxygen reduction reaction.

scholarly journals A green approach to prepare hierarchical porous carbon nanofibers from coal for high-performance supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 6184-6192 ◽  
Author(s):  
Fenglian Tong ◽  
Wei Jia ◽  
Yanliang Pan ◽  
Jixi Guo ◽  
Lili Ding ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Carbon Nanofibers ◽  
Porous Carbon ◽  
High Performance ◽  
High Specific Capacitance ◽  
Hierarchical Porous Carbon ◽  
Green Method ◽  
Long Cycle Life ◽  
Green Approach ◽  
Hierarchical Porous

A green method is designed to obtain hierarchical porous carbon nanofibers from coal for supercapacitor electrodes with high specific capacitance and long cycle life.

Green synthesis of hierarchical porous carbon with adjustable porosity for high performance supercapacitors

2021 ◽  
pp. 108488
Author(s):  
Yalei Qiao ◽  
Rong Zhang ◽  
Ruimin Li ◽  
Wei Fang ◽  
Zixiang Cui ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Porous Carbon ◽  
High Performance ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous
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